HORIZONTAL WIND POWERED TURBINE
A wind powered turbine is comprised of a frame on which is horizontally and rotatably supported a rotor on a rotor shaft. The rotor is formed by three or more radial blade members which are secured to the rotor shaft. The radial blade members are equidistantly spaced from one another and each have support arms and a wind vane secured at an outer end portion of the support arms. The wind vane is shaped to capture an airflow directed thereagainst for displacement thereof to create a rotational force about the rotor shaft to rotate the shaft about its longitudinal central axis. The radial blade members are rigidly interconnected to one another at an outer end portion thereof by tension adjustable bracing tie wires. A wind channeling guide assembly accelerates and directs the airflow in an actuating airflow path to impinge upon at leas of the wind vanes positioned in the actuating airflow path.
This application is a continuation-in-part of PCT Application No. PCT/CA2010/000528, filed on Apr. 8, 2010.
TECHNICAL FIELDThe present invention relates to a lightweight horizontal wind powered turbine for generating power.
BACKGROUND ARTHigh cost of energy and the depletion of natural resources has led to the increasing development of environmentally safe and inexpensive alternative energy sources. The present invention concerns the use of the wind energy to develop electrical energy and specifically to wind powered turbines. Wind powered turbines have been in existence for many years but these are usually very costly to produce and often are not operational at very low wind speeds namely below 5 km/h. Some of these wind turbines are also massive structures which are unsightly and therefore are usually located in remote areas with the electricity produced being conducted by overhead or underground cables to distribution transformers. These large wind turbine structures are also expensive to install, requiring heavy equipment and a skilled workforce. Before the installation of such turbines it is also necessary to obtain environment impact studies and approval by regional governing bodies which demands public consultations. These large wind turbines are vertically mounted turbines and are not pleasing to the eye and not suitable to adapt to produce electricity for a single industrial or residential building. However, horizontal wind turbines have proven more pleasing to the eye but again the constructions thereof are often unsightly and they are often too costly and heavy for mounting on roofs of building structures. Typical examples of wind powered horizontal turbines are disclosed in U.S. Pat. Nos. 6,981,839 and 7,540,705 and British Patent GB 2,185,786. The wind turbines disclosed by these patents all have certain constraints such as not being able to operate at low wind speeds, they are heavy and noisy, require extensive maintenance and are not aesthetically pleasing when mounted on the roof tops of buildings.
DISCLOSURE OF INVENTIONIt is a feature of the present invention to provide a horizontal wind powered turbine which substantially obviates the above-mentioned disadvantages of existing horizontal wind turbines.
A further feature of the present invention is to provide a horizontal wind powered turbine wherein the rotor is constructed in a unique fashion to make it very lightweight and capable of operating at very low wind speeds.
Another feature of the present invention is to provide a horizontal wind powered turbine which may operate in a uni-directional or bi-directional state without displacing the turbine.
Another feature of the present invention is to provide a horizontal wind powered turbine which is easy to install and does not require skilled personnel for its installation and servicing.
Another feature of the present invention is to provide a horizontal wind powered turbine which can be automatically controlled by a programmed controller module.
Another feature of the present invention is to provide a horizontal wind powered turbine which may be coupled in series and which series can be disposed in an assembly of back-to-back spaced series connected turbines.
Another feature of the present invention is to provide a horizontal wind powered turbine having an air inlet channeling structure provided with an adjustable gate defining a shape to impart a venturi effect to the airflow entering the turbine.
Another feature is to provide a horizontal wind turbine to which is integrated photovoltaic solar panels to increase the W/m2 of roof top.
According to the above features, from a broad aspect, the present invention provides a horizontal wind powered turbine comprised of a frame on which is horizontally and rotatably supported a rotor on a rotor shaft. The rotor is formed by three or more radial blade members secured to the rotor shaft by securement means. The radial blade members are equidistantly spaced from one another. Each radial blade member has support arms and a wind vane secured to an outer end portion of the support arms. The wind vane is shaped to capture an airflow directed thereagainst for displacement thereof to create a rotational force about the rotor shaft to rotate the rotor shaft about a longitudinal central axis thereof. The radial blade members are rigidly interconnected to one another at an outer end portion thereof by tension adjustable bracing means. Wind channeling guide means are provided to accelerate and direct the airflow in an actuating airflow path to impinge upon at least one of the wind vanes positioned in the actuating airflow path to displace the wind vane by wind drag.
According to another broad aspect of the present invention the wind vanes can be either of elongated bucket-shaped wind vanes or elongated elliptically-shaped wind vanes.
A preferred embodiment of the present invention will now be described with reference to the accompanying drawings in which:
Referring now to the drawings and more particularly to
As hereinshown there are seven radial blade members 14 which are equidistantly spaced from one another about the rotor shaft 13. Each radial blade member 14 has support arms 15 and a wind vane 16 secured to an outer end portion of the support arms 15. The wind vane 16 is shaped to capture an airflow 20, as shown in
The radial blade members 14 are rigidly interconnected to one another at an outer end portion thereof by tension adjustable bracing tie-wires 18 which constitute an adjustable bracing means. These tie-wires are steel wires and their adjustability provide for a rotor structure which is very lightweight and strong, providing for a lightweight rotor shaft thereby greatly reducing the weight of the rotor shaft and the assembly 14 and permitting the rotor to be actuated or displaced at very low wind speeds below 5 km/h. The tie-wires 18 may be constructed of other suitable material including composite materials.
The wind powered turbine of the present invention also has an air inlet channeling structure 17 to accelerate and direct the incoming airflow, herein represented by arrow 20, in an actuating airflow path 21 (see
As shown in
As shown in
Intermediate wind captivating walls 27′ may be provided if additional support arms, such as support arm 15′, are provided. These transverse end walls 27 and intermediate wall 27′ are secured behind the support arms 15 and 15′, respectively.
With reference now to
With reference now to
It is also pointed out that the wire attachment sleeve 30 can be made displaceable about a stationary post or the bolt 28 to provide this adjustment. By displacing the nuts 31 and 32 along the threaded shaft, which is now stationary, the sleeve position is made adjustable. Both these adjustable wire connectors have been found to be very effective, precise and an economical adjustable mechanism.
The tie-wires interconnected together about the outer circumference of the rotor assembly maintain the support arms captive in the hollow tubular posts 36 of the shaft connecting assembly 35, shown in
Referring now to
The adjustable venturi gate 47 is pressure biased in an open position by a pair of shocks 49 and a wire and pulley mechanism 50 comprised of wire 51 and guide pulleys 52 and motor 53 displace the adjustable venturi gate against the biasing force of the pistons 49′ to set the proper distance between the inner venturi surface 48 of the gate and the top surface 45′ of the inclined guide ramp. This biasing arrangement obviates the use of a hydraulic system which is costly and troublesome. As shown in
Wind speed test have shown that with the adjustable venturi gate 47 positioned as shown in
As shown in
Referring now to
As shown in
Referring now to
As shown in
As shown in
Although not shown, it is contemplated that the horizontal wind turbine can be mounted on a swivel base and may also have a wind fin or sensor to orient the turbine in the wind direction. Such an installation could be used where there is no electrical power available to supply a limited user load.
Referring now to
Because of their lightweight structure, many of these turbines can be supported on the rooftops of buildings. It is also easier to capture wind on top of buildings often catching the updraft created by the building wall below the turbines. The electrical infrastructure is already close to the roof.
Referring to
The solar panels utilized are flexible photovoltaic panels which are usually in sheet form and can be glued on the surfaces. They are less expensive than rigid panels requiring fixed supports which are not necessary in our application, resulting in a cost savings of about 40%. The photovoltaic sheets may be glued on the surfaces.
The following are examples of increase in energy produced with the combined power generation wind turbine.
EXAMPLE 1Increase in power for a wind turbine of 10 kW, namely 5 modules of 2 kW.
Installation of 55 FlexLight Uni-Solar PVL 68 watt laminates
- Max. power of the turbine: 10 000 W
- Max. power of the solar panels: 3740 W
- Max. increase in power generated: 137%
Increase in power for a wind turbine of 10 kW having a utilization factor of 20%.
If we compare the solar panels secured to the wind turbine to panels secured to supports on a roof top, the electricity production increases by 112%.
The wind powered turbine of the present invention offers several advantages:
-
- Can be installed on flat or inclined roofs.
- Its horizontal configuration.
- Its modular aspect (side-by-side).
- The shelter structure protects against bad weather conditions.
- The doors are adjustable to increase, decrease or stop inlet wind.
- Each turbine section is 10′ in length (however this dimension may vary).
- Lightweight structure.
- Low height makes components easily accessible.
- Can be installed on existing buildings.
- Given size of the assembly, special installation permits may be avoided.
- Can generate power from winds as low as 5 km/h which is typically 80% of winds in certain areas.
- Can possibly sustain up to 200 km/h winds.
- Wind deflection concentrates wind towards the wind catching vanes and improves power generation efficiency.
- Structure of assembly easily accessible for maintenance with even a step-ladder.
- If a wind catching vane fails, it may be easily replaced.
- Assembly may be disassembled by hand.
- Can be installed for residential, industrial, institutional applications.
- Simple maintenance.
- Low cost.
- Overall size may be adjusted for different applications.
- Assembly may be easily transported from one location to another.
- As opposed to large wind turbines that require construction of specific access roads, the present assembly does not require such an infrastructure for installation onsite.
- Easy to manufacture.
- Can resist to wind gusts.
- Small, medium and large power applications can be designed from the same concept and simply scaling the components appropriately.
- Personnel within the building supporting the wind turbine can supervise operation of the turbine. No specially-qualified personnel is required.
- Replacement parts are easily accessible and can be provided under short notice.
- It may also directly produce hydrogen or heat water for future use.
- Can couple photo cell panels to produce more electricity per square meter of space on a roof top.
Referring now to
The adjustable wire connectors 25 are also secured to the tie-wires 18 in the same fashion as previously described. The support arms 106 are further connected to a rotor shaft 13 as previously described which as shown in
The housing 95 also has a convexly curved top wall 121 with the elliptically-shaped wind vanes 100 spaced inwardly therefrom as shown in
As shown in
The elongated elliptically-shaped wind vanes are known in the art and used in vertical wind generators. These vanes are commonly referred to as Darrieus wind vanes. These vanes are more efficient than the bucket vanes as described herein and the Table as illustrated in
It is within the ambit of the present invention to cover any obvious modifications of the preferred embodiment described herein provided such modifications fall within the scope of the appended claims.
Claims
1. A horizontal wind powered turbine comprising a frame on which is horizontally and rotatably supported a rotor on a rotor shaft, said rotor being formed by three or more radial blade members secured to said rotor shaft by securement means, said radial blade members being equidistantly spaced from one another, each said radial blade member having support arms and a wind vane secured to an outer end portion of said support arms, said wind vane being shaped to capture an airflow directed thereagainst for displacement thereof to create a rotational force about said rotor shaft to rotate said rotor shaft about a longitudinal central axis thereof, said radial blade members being rigidly interconnected to one another at an outer end portion thereof by tension adjustable bracing means, and wind channeling guide means to accelerate and direct said airflow in an actuating airflow path to impinge upon said wind vanes positioned in said actuating airflow path to displace said wind vane by wind drag.
2. A horizontal wind powered turbine as claimed in claim 1 wherein said tension adjustable bracing means is comprised by tie-wires of equal lengths secured to an adjustable wire connector secured to said support arms of said radial blade members.
3. A horizontal wind powered turbine as claimed in claim 2 wherein said adjustable wire connector is secured to a free outer end of each said support arms, said wind vane being secured between two support arms.
4. A horizontal wind powered turbine as claimed in claim 3 wherein said adjustable wire connector is a wire retention member displaceable by positioning means along a longitudinal axis of said support arms.
5. A horizontal wind powered turbine as claimed in claim 4 wherein said wire retention member is a wire attachment sleeve about which loop ends of opposed tie-wires are retained captive, said wire attachment sleeve being displaced along a threaded bolt secured in a top end of said support arms, said positioning means being lock nuts threadably secured to said threaded bolt with said sleeve held captive therebetween.
6. A horizontal wind powered turbine as claimed in claim 3 wherein said adjustable wire connector is an adjustable bolt connector having a threaded shaft portion threadably connected in said free outer end, a wire attaching sleeve supported by said threaded shaft portion for captively receiving an end attaching loop of opposed tie-wires, said bolt connector having an engageable outer head to impart rotation of said bolt connector to cause displacement of said wire attaching sleeve to increase or decrease tension in said opposed tie-wires to balance and strengthen said radial blade members about said rotor shaft.
7. A wind powered turbine as claimed in claim 3 wherein said securement means is comprised by two shaft connecting assemblies, each assembly having three or more rigid posts immovably secured to said shaft and spaced apart to displaceably interconnect with an inner connecting end portion of said two support arms of said three or more radial blade members.
8. A wind powered turbine as claimed in claim 7 wherein said rigid posts are hollow tubular posts, said support arms being straight rods having a cross-section for close sliding fit engagement in respective ones of said hollow tubular posts, and arresting means to temporarily immovably secure said straight rods in said hollow tubular posts at a predetermined position.
9. A wind powered turbine as claimed in claim 8 wherein there is further provided spring biasing means held captive in said hollow tubular posts to permit axial displacement of said straight rods due to thermal expansion and contraction, said tie-wires maintaining said solid rods captive in said hollow tubular posts.
10. A wind powered turbine as claimed in claim 7 wherein said two shaft connecting assemblies further comprises flat disc connectors having a hub secured to said shaft, said three or more rigid posts being secured to a side wall of said flat disc.
11. A wind powered turbine as claimed in claim 10 wherein said shaft connecting assemblies are made of steel, said two support arms and said wind vane being constructed of lightweight aluminum material.
12. A wind powered turbine as claimed in claim 1 wherein said wind vanes are shaped as buckets having an elongated inwardly curved inner wall and opposed transverse end walls, said opposed transverse end walls having a straight forward edge, said support arms being straight support arms, said outer end portion of said support arms being secured to a respective one of said straight forward edge of said transverse end walls.
13. A wind powered turbine as claimed in claim 12 wherein said inwardly curved inner wall has a cross-sectional shape which is one of semi-elliptical or semi-circular.
14. A wind powered turbine as claimed in claim 12 wherein said transverse end walls are wind captivating end walls, and wherein there is further provided one or more spaced intermediate wind captivating walls between said end walls.
15. A wind powered turbine as claimed in claim 14 wherein at least a further one of said support arms is secured to said straight forward edge of one or more of said intermediate wind captivating walls.
16. A wind powered turbine as claimed in claim 1 wherein said wind channeling guide means comprises an air inlet channeling structure comprised by an inclined guide ramp wall below an air inlet end of said frame and an adjustable venturi gate hingedly secured to said frame above said air inlet end, said adjustable venturi gate having an inner wall surface defining a curvature to impart a venturi effect to said airflow upwind of said air inlet end when positioned a predetermined distance spaced from said ramp wall to accelerate said airflow.
17. A wind powered turbine as claimed in claim 16 wherein said adjustable venturi gate is displaceable from an open position to a closed position, when in said closed position said adjustable gate substantially obstructs said air inlet end, said adjustable gate being biased to said open position by pressure exerting means and gate displacement means to displace and retain said gate at a desired position against said pressure exerting means.
18. A wind powered turbine as claimed in claim 17 wherein said pressure exerting means is constituted by one or more shocks.
19. A wind powered turbine as claimed in claim 16 wherein said ramp wall is provided with a plurality of vertical guide ribs disposed spaced-apart and axially oriented towards said air inlet end to redirect air from said airflow path impinging thereupon angularly.
20. A wind powered turbine as claimed in claim 17 wherein said gate displacement means is comprised by a pulley and cable motor driven mechanism controlled by a controller unit.
21. A wind powered turbine as claimed in claim 17 wherein said gate displacement means is comprised by a mechanically adjustable mechanism.
22. A wind powered turbine as claimed in claim 16 wherein said frame is provided with an outwardly curved top wall spaced above said radial blade members and extending from said air inlet end to an outlet end.
23. A wind powered turbine as claimed in claim 16 wherein said wind powered turbine is a bi-directional turbine, and wherein a rear end of said frame is provided with top and bottom outlet gates hingedly secured to a top half and lower half portion of said frame above said half potions, said outlet gates being biased in an open position by pressure exerting means, and gate displacement means to position said outlet gates to guide back winds into said lower half portion of said frame to create a reverse actuating airflow path to impinge upon said radial blade members in a lower portion of said frame, said inclined guide ramp wall having a hinged ramp section hingeable inward to create an opening below said air inlet end for the passage and guidance of said reverse actuating airflow path, said hinged ramp section providing a guide wall surface for said reverse actuating airflow path.
24. A wind powered turbine as claimed in claim 1 wherein two or more of said wind powered turbines are disposed in side-by-side relationship with their rotor shaft interconnected by a flexible coupling to form a common rotor shaft driven by said two or more wind power turbines.
25. A wind powered turbine as claimed in claim 24 wherein said flexible coupling is comprised of a sprocket secured to adjacent ends of said rotor shaft, said sprockets being interconnected together by a chain link belt engaged about said sprockets to permit flexibility between said interconnected rotor shafts.
26. A wind powered turbine as claimed in claim 24 wherein said wind powered turbines are further disposed in spaced back-to-back spaced relationship.
27. A wind powered turbine as claimed in claim 17 wherein said rotor shaft is drivingly connected to an electric motor to generate a variable electric voltage, a regenerative drive with a torque set point supplies a regulated output voltage to an electrical network infrastructure of a building to be supplied by said wind powered turbine.
28. A wind powered turbine as claimed in claim 27 wherein there is further comprised a system controller for controlling said wind powered turbine, said controller controlling said gate displacement means, and sensors secured to said controller for monitoring wind speed, noise and vibration.
29. A wind powered turbine as claimed in claim 22 wherein said outwardly curved top wall of said frame and a top surface of said adjustable venturi gate are provided with photocells to increase the W/m2 (watts per meter square) generated on a roof top to which said wind powered turbines are installed.
30. A wind powered turbine as claimed in claim 23 wherein said outwardly curved top wall of said framer and a top surface adjustable venturi gate and said top outlet gate are provided with photocells to increase the W/m2 (watts per meter square) generated on a roof top to which said wind powered turbines are installed.
31. A wind powered turbine as claimed in claim 29 wherein said photocells are photovoltaic photocells formed as a flexible sheet.
32. A wind powered turbine as claimed in claim 30 wherein said photocells are photovoltaic photocells formed as a flexible sheet.
33. A wind powered turbine as claimed in claim 1 wherein said wind vanes are elongated elliptically-shaped wind vanes having an elliptical transverse cross-section and define a convexly curved front nose section and inwardly and rearwardly tapered lower and upper walls terminating in a narrow pointed rear edge.
34. A horizontal wind powered turbine as claimed in claim 33 wherein said tension adjustable bracing means is comprised by tie-wires of equal lengths secured to an adjustable wire connector secured to said support arms of said radial blade members.
35. A horizontal wind powered turbine as claimed in claim 34 wherein said adjustable wire connector is secured to a free outer end of each said support arms, said wind vane being secured between two support arms.
36. A horizontal wind powered turbine as claimed in claim 35 wherein said adjustable wire connector is a wire retention member displaceable by positioning means along a longitudinal axis of said support arms.
37. A horizontal wind powered turbine as claimed in claim 36 wherein said wire retention member is a wire attachment sleeve about which loop ends of opposed tie-wires are retained captive, said wire attachment sleeve being displaced along a threaded bolt secured in a top end of said support arms, said positioning means being lock nuts threadably secured to said threaded bolt with said sleeve held captive therebetween.
38. A horizontal wind powered turbine as claimed in claim 35 wherein said adjustable wire connector is an adjustable bolt connector having a threaded shaft portion threadably connected in said free outer end, a wire attaching sleeve supported by said threaded shaft portion for captively receiving an end attaching loop of opposed tie-wires, said bolt connector having an engageable outer head to impart rotation of said bolt connector to cause displacement of said wire attaching sleeve to increase or decrease tension in said opposed tie-wires to balance and strengthen said radial blade members about said rotor shaft.
39. A wind powered turbine as claimed in claim 35 wherein said securement means is comprised by two shaft connecting assemblies, each assembly having three or more rigid posts immovably secured to said shaft and spaced apart to displaceably interconnect with an inner connecting end portion of said two support arms of said three or more radial blade members.
40. A wind powered turbine as claimed in claim 39 wherein said rigid posts are hollow tubular posts, said support arms being straight rods having a cross-section for close sliding fit engagement in respective ones of said hollow tubular posts, and arresting means to temporarily immovably secure said straight rods in said hollow tubular posts at a predetermined position.
41. A wind powered turbine as claimed in claim 40 wherein there is further provided spring biasing means held captive in said hollow tubular posts to permit axial displacement of said straight rods due to thermal expansion and contraction, said tie-wires maintaining said solid rods captive in said hollow tubular posts.
42. A wind powered turbine as claimed in claim 39 wherein said two shaft connecting assemblies further comprises flat disc connectors having a hub secured to said shaft, said three or more rigid posts being secured to a side wall of said flat disc.
43. A wind powered turbine as claimed in claim 42 wherein said shaft connecting assemblies are made of steel, said two support arms and said wind vane being constructed of lightweight aluminum material.
44. A wind powered turbine as claimed in claim 33 wherein said wind channeling guide means comprises an air inlet channeling structure comprised by an inclined guide ramp wall below an air inlet end of said frame and an adjustable venturi gate hingedly secured to said frame above said air inlet end, said adjustable venturi gate having an inner wall surface defining a curvature to impart a venturi effect to said airflow upwind of said air inlet end when positioned a predetermined distance spaced from said ramp wall to accelerate said airflow.
45. A wind powered turbine as claimed in claim 44 wherein said adjustable venturi gate is displaceable from an open position to a closed position, when in said closed position said adjustable gate substantially obstructs said air inlet end, said adjustable gate being biased to said open position by pressure exerting means and gate displacement means to displace and retain said gate at a desired position against said pressure exerting means.
46. A wind powered turbine as claimed in claim 45 wherein said pressure exerting means is constituted by one or more shocks.
47. A wind powered turbine as claimed in claim 44 wherein said ramp wall is provided with a plurality of vertical guide ribs disposed spaced-apart and axially oriented towards said air inlet end to redirect air from said airflow path impinging thereupon angularly.
48. A wind powered turbine as claimed in claim 44 wherein said frame is provided with an outwardly curved top wall spaced above said radial blade members and extending from said air inlet end to an outlet end.
49. A wind powered turbine as claimed in claim 33 wherein there are a plurality of said elliptically-shaped wind vanes secured spaced-apart about said rotor shaft.
Type: Application
Filed: May 12, 2011
Publication Date: Oct 13, 2011
Patent Grant number: 8840360
Inventor: Réjean QUINTAL (St-Jean-sur-Richelieu)
Application Number: 13/106,215
International Classification: F03D 3/06 (20060101); F03D 11/00 (20060101);